WordPress Social Login and Register (Discord, Google, Twitter, LinkedIn) <= 7.6.6 - Authenticated (Subscriber+) Privilege Escalation

The WordPress Social Login and Register (Discord, Google, Twitter, LinkedIn) plugin for WordPress is vulnerable to privilege escalation in all versions up to, and including, 7.6.6. This is due to the plugin improperly restricting user meta values that can be updated and allowing users to control a user role update during a social login through the custom registration form. This makes it possible for authenticated attackers, with subscriber-level access and above, to escalate their privileges to that of an administrator. We believe that this vulnerability requires the Custom Registration Add-on to be enabled, however, this is simply based on our assessment with the limited information available.